How does Google Analytics integration work?
Out of the box, MageMail will use utm_source, utm_medium, and utm_campaign query string parameters.
The utm_campaign code is determined by this field:
MageMail also adds open tracking directly into GA, but you have to populate your Google Analytics account number here in order to do so:
You'll be able to see traffic and revenue data under the Acquisition > All Traffic > Source/Medium menu: